STPS1L40AFN STMicroelectronics Schottky Diode (Small Outline Diode Flat Lead) In Stock

Name: STPS1L40AFN
Brand: STMicroelectronics
SKU: STPS1L40AFN
Availability: InStock

STMicroelectronics STPS1L40AFN is a single silicon Schottky rectifier diode rated at 1 A forward current and 40 V reverse voltage. It features a low 0.63 V maximum forward voltage and 60 A non-repetitive peak current capability for freewheeling applications. Supplied in a compact SOD flat-lead package with worldwide shipping.

OBSOLETESchottky DiodeVerified May 2026

Package / Visual Reference

STPS1L40AFNSmall Outline Diode Flat Lead

Quick Facts

Manufacturer: STMicroelectronics
Package: Small Outline Diode Flat Lead
Pin Count: 2
Lifecycle: OBSOLETE
Datasheet: STPS1L40AFN Datasheet PDF
Category: Schottky Diode
Price: From $0.0651(MOQ 50000)
Temp Range: ?°C to 175.0°C
RoHS: Compliant
Lead Time: 3–7 business days
Shipping: DHL Express · Worldwide

What are the key features of STPS1L40AFN?

Low 0.63 V maximum forward voltage reduces conduction losses in DC-DC converters and rectifier stages operating at 40 V
60 A non-repetitive peak forward current capability for robust freewheeling protection in inductive load switching circuits
Single silicon Schottky rectifier in a compact R-PDSO-F2 flat-lead package optimized for surface-mount power applications

What is STPS1L40AFN used for?

The STPS1L40AFN is used as a freewheeling diode in DC-DC buck and boost converters, providing a low-loss current path for inductive energy during switch-off intervals. Its 40 V reverse voltage and 1 A continuous forward current rating suit it for low-voltage power supply output stages and motor drive snubber circuits. The low forward voltage of 0.63 V maximum minimizes power dissipation in battery-powered and energy-efficient designs.

What are the specifications of STPS1L40AFN?

YTEOL	0
Additional Feature	FREE WHEELING DIODE
Application	POWER
Configuration	SINGLE
Diode Element Material	SILICON
Diode Type	RECTIFIER DIODE
Forward Voltage-Max (VF)	0.63V
JESD-30 Code	R-PDSO-F2
Non-rep Pk Forward Current-Max	60A
Number of Elements	1
Number of Phases	1
Output Current-Max	1A
Package Body Material	PLASTIC/EPOXY
Package Shape	RECTANGULAR
Package Style	SMALL OUTLINE
Peak Reflow Temperature (Cel)	NOT SPECIFIED
Rep Pk Reverse Voltage-Max	40V
Reverse Current-Max	35 µA
Reverse Test Voltage	40V
Surface Mount	YES
Technology	SCHOTTKY
Terminal Form	FLAT
Terminal Position	DUAL
Time@Peak Reflow Temperature-Max (s)	NOT SPECIFIED
Package	Small Outline Diode Flat Lead

Compliance & Regulatory

RoHS Status	Compliant
Lead-Free	Yes (Pb-Free)
ECCN	EAR99
HTS Code	8541.10.00.80
Country of Origin	Morocco

Where can I find the STPS1L40AFN datasheet?

STPS1L40AFN Datasheet Download

Official datasheet from STMicroelectronics

What are equivalent replacements for STPS1L40AFN?

No known alternates. Submit an RFQ and our team can suggest alternatives.

Frequently Asked Questions

What forward voltage does STPS1L40AFN exhibit, and why does this matter for DC-DC converter efficiency?

The STPS1L40AFN has a maximum forward voltage of 0.63 V at rated current. Lower forward voltage directly reduces conduction loss in rectifier stages; compared to a standard PN diode with roughly 0.7 V to 1.0 V drop, this Schottky device recovers measurable efficiency in 40 V DC-DC converters switching at hundreds of kilohertz.

For which inductive switching applications is STPS1L40AFN suited as a freewheeling diode?

It is designed as a freewheeling diode in buck converters, boost converters, flyback stages, and motor-drive H-bridge circuits. The 60 A non-repetitive peak forward current rating provides protection against inductive kick transients, while the 40 V reverse voltage covers typical 24 V and 36 V bus designs with adequate margin.

How does the SOD flat-lead (R-PDSO-F2) package of STPS1L40AFN simplify assembly on a power PCB?

The R-PDSO-F2 flat-lead package uses a small 2-terminal surface-mount footprint with low profile, reducing board area compared to axial-lead through-hole diodes. This simplifies automated SMT assembly and enables tight placement next to switching MOSFETs in compact power modules, keeping parasitic inductance below 1 nH in the freewheeling loop.

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AvailabilityIn Stock

Reference Price (USD)

From $0.0651

Buy from 1pc · Factory-direct pricing

Qty.	Unit Price	Ext. Price
50000+	$0.0688	$3441.00
70000+	$0.0665	$4657.10
100000+	$0.0651	$6513.00

pcs

Unit price: $0.0688 · Total: $3441.00

In Stock · 24h Response · Worldwide Shipping

Direct Contact

WhatsApp Inquiry Email RFQ

Lead Time3-7 business days

MOQFrom 1 piece

ShippingDHL / FedEx / UPS

OriginChina (Authorized)

Response within 24 hours · Worldwide shipping

“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”

Marco Rossi

CTO, AutoDrive Systems, Italy

STPS1L40AFN STMicroelectronics Schottky Diode (Small Outline Diode Flat Lead) In Stock

What are the key features of STPS1L40AFN?

What is STPS1L40AFN used for?

What are the specifications of STPS1L40AFN?

Compliance & Regulatory

Where can I find the STPS1L40AFN datasheet?

What are equivalent replacements for STPS1L40AFN?

Frequently Asked Questions

What forward voltage does STPS1L40AFN exhibit, and why does this matter for DC-DC converter efficiency?

For which inductive switching applications is STPS1L40AFN suited as a freewheeling diode?

How does the SOD flat-lead (R-PDSO-F2) package of STPS1L40AFN simplify assembly on a power PCB?

Related Guides

CSD87313DMS Synchronous Buck Power Stage Design Guide

STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection

C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC

STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security

Why Buy from FindMyChip

About STMicroelectronics

More from STMicroelectronics

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